package com.iflytek.day08;

public class _16_ConcatString {
  public static void main(String[] args) {
    // 1.定义数组
    int[] arr = {1, 2, 3};
    // 2.调用方法把数组变成字符串
    String str = arrToString(arr);
    System.out.println(str);
  }

  public static String arrToString(int[] arr) {
    StringBuilder sb = new StringBuilder();
    sb.append("[");

    for (int i = 0; i < arr.length; i++) {
      if (i == arr.length - 1) {
        sb.append(arr[i]);
      } else {
        sb.append(arr[i]).append(", ");
      }
    }
    sb.append("]");
    return sb.toString();
  }
}
